US4141482A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminated compacted particle aluminum sheet
Assignee: Reynolds Metals Co
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Filing: 1977-04-25
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Granted: 1979-02-27
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Expires: 1997-04-25
Abstract
Abstract Compacted-particle sheets are wrought from essentially scrap aluminum. A relatively thick composite laminate of such sheets is then produced by preheating a plurality of compacted-particle sheets and bonding them together by hot rolling in a single pass through a hot rolling mill to achieve a thickness reduction of about 50 percent. A second pass through a rolling mill results in a further 20 percent reduction and improved bonding. Improved laminate qualities are also obtained by further laminating with other aluminum alloys and other metals.
Inventors
- 👤 William G. Reynolds
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:51
CPC Classifications
B; B23; B23K; B23K20/00; B23K20/04
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
91 words
A method of producing laminated compacted-particle aluminum sheets including the steps of: providing a plurality of compacted-particle aluminum sheets and forming said plurality of sheets into a plurality of laminates; preheating each of said laminates of compacted-particle aluminum sheets; rolling each of said laminates in a hot rolling mill to bond said sheets together and form bonded composite laminates; cleaning each of said composite laminates; fastening said cleaned composite laminates together; further preheating the thusly fastened composite laminates; and hot rolling the thusly fastened composite laminates to heat bond them together.
Claim 2
Independent Claim
91 words
A method of producing laminated compacted-particle aluminum sheets including the steps of: providing a plurality of compacted-particle aluminum sheets and forming said plurality of sheets into a plurality of laminates; preheating each of said laminates of compacted-particle aluminum sheets; rolling each of said laminates in a hot rolling mill to bond said sheets together and form bonded composite laminates; cleaning each of said composite laminates; fastening said cleaned composite laminates together; further preheating the thusly fastened composite laminates; and hot rolling the thusly fastened composite laminates to heat bond them together.
Claim 3
Dependent Claim
25 words
The method as in claim 1 including the step of annealing the resulting heat-bonded composite laminate; and cooling said resulting laminate at a controlled rate.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-02-26 | 1982-08-28 | 1983-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-26 | 1986-08-28 | 1987-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-26 | 1990-08-28 | 1991-02-27 | $7700.00 | Window Closed / Lapsed |